
100.210-IOM (FEB 2015)
Page 26
VYPER
™
VARIABLE SPEED DRIVE
INSTALLATION
These.holes.are.strategically.placed.so.that.the.field.wiring.
does.not.interfere.with.the.electronics.in.the.panel..Never.
allow.field.wiring.to.come.in.close.proximity.with.the.con-
troller.boards.since.this.will.almost.always.cause.problems.
Do.not.drill.into.an.electronic.control.panel.to.locate.conduit.
connections..You.are.probably.not.entering.the.panel.where.
the.manufacturer.would.like.you.to.since.most.manufactur-
ers.recommend.or.provide.prepunched.conduit.connections...
You.may.also.be.negating.the.NEMA.rating.of.the.enclosure..
Drilling.can.cause.metal.filings.to.land.on.the.electronics.and.
create.a.short.circuit.when.powered.is.applied..If.you.must.
drill.the.panel,.take.the.following.precautions:.
•
. First,.call.the.panel.manufacturer.before.drilling.into.the.
panel.to.be.sure.you.are.entering.the.panel.at.the.right.
place..
•
. Take.measures.to.avoid.ESD.(electrostatic.discharge).to.
the.electronics.as.you.prep.the.inside.of.the.Electronic.
control.panel..This.can.be.done.by.employing.an.antistatic.
wrist.band.and.mat.connected.to.ground..
•
. Cover. the. electronics. with. plastic. and. secure. it. with.
masking.or.electrical.tape..
•
. Place.masking.tape.or.duct.tape.on.the.inside.of.the.panel.
where.you.are.going.to.drill..The.tape.will.catch.most.of.
the.filings..
•
. Clean.all.of.the.remaining.filings.from.the.panel.before.
removing.the.protective.plastic..
When. routing. conduit. to. the. top. of. an. electronic. control.
panel,.condensation.must.be.taken.into.consideration..Water.
can.condense.in.the.conduit.and.run.into.the.panel.causing.
catastrophic.failure..Route.the.conduit.to.the.sides.or.bottom.
of.the.panel.and.use.a.conduit.drain..If.the.conduit.must.be.
routed.to.the.top.of.the.panel,.use.a.sealable.conduit.fitting.
which. is. poured. with. a. sealer. after. the. wires. have. been.
pulled,. terminated,. and. the. control. functions. have. been.
checked..A.conduit.entering.the.top.of.the.enclosure.must.
have.a.NEMA-4.hub.type.fitting.between.the.conduit.and.
the.enclosure.so.that.if.water.gets.on.top.of.the.enclosure.
it.cannot.run.in.between.the.conduit.and.the.enclosure..This.
is.extremely.important.in.outdoor.applications.
NOTICE
It is NEVER a good practice to enter through the top of
an electronic control panel or starter panel that does
not already have knockouts provided. If knockouts are
not provided for this purpose it is obvious this is not
recommended and could VOID WARRANTY.
Never add relays, starters, timers, transformers, etc. in-
side an electronic control panel without first contacting
the manufacturer.
. Contact. arcing. and. EMI. emitted. from.
these.devices.can.interfere.with.the.electronics..Relays.and.
timers.are.routinely.added.to.electronic.control.panels.by.the.
manufacturer,.but.the.manufacturer.knows.the.acceptable.
device. types. and. proper. placement. in. the. panel. that. will.
keep.interference.to.a.minimum..If.you.need.to.add.these.
devices,. contact. the. manufacturer. for. the. proper. device.
types.and.placement....
Never run refrigerant tubing inside an electronic control
panel.
If.the.refrigerant.is.ammonia,.a.leak.will.totally.destroy.
the.electronics.
If the electronic control panel has a starter built into the
same panel, be sure to run the higher voltage wires where
indicated by the manufacturer.
. EMI. from. the. wires. can.
interfere.with.the.electronics.if.run.too.close.to.the.circuitry.
Never daisy-chain or parallel-connect power or ground
wires to electronic control panels.
.Each.electronic.control.
panel.must.have.its.own.control.power.supply.and.ground.
wires.back.to.the.power.source.(Plant.Transformer)..Multiple.
electronic.control.panels.on.the.same.power.wires.create.
current.surges.in.the.supply.wires,.which.may.cause.control-
ler.malfunctions..Daisy-chaining.ground.wires,.taking.them.
to.ground.at.each.device,.allows.ground.loop.currents.to.
flow.between.electronic.control.panels.which.also.causes.
malfunctions..See.Figure.5.
Figure 17 - Electronic Control Panel Power Supplies
COMMUNICATIONS
The. use. of. communications. such. as. serial. and. ethernet.
in. industrial. environments. are. commonplace.. The. proper.
installation.of.these.networks.is.as.important.to.the.proper.
operation. of. the. communications. as. all. of. the. preceding.
practices.are.to.the.equipment..
Serial.communications.cable.needs.to.be.of.the.proper.gauge.
based.on.the.total.cable.distance.of.the.run..Daisy-chaining.
is.the.only.acceptable.style.of.running.the.communications.
cable..While.Star.Networks.may.use.less.cable,.they.more.
often.than.not.cause.problems.and.interruptions.in.communi-
cations,.due.to.varying.impedances.over.the.varying.lengths.
of.cable..Ground.or.drain.wires.of.the.communications.cable.
are.to.be.tied.together.at.each.daisy-chain.connection.and.
only.taken.to.ground.in.the.central.control.system.panel.